\documentclass{article}


%%-----------PGF/TIKZ
\usepackage{pgf}
\usepackage{tikz}
\usetikzlibrary{arrows,shapes,positioning,trees,mindmap}

\usepackage{palatino}

% Use preview.sty to crop the page
\usepackage[active,tightpage]{preview}
\PreviewEnvironment{pgfpicture}
\setlength\PreviewBorder{0pt}

\begin{document}

\begin{figure}
\begin{tikzpicture} []
	\path[mindmap,concept color=gray!30] 
		node[concept] {Brackish Marsh Project} [clockwise from=0] 
			child[concept color=green!50!gray] { node[concept] {Web  Interface} }
			child[concept color=blue!40] { 
				node[concept] {Flow Model} [clockwise from=-30] 
					child[concept color=purple!40] { node[concept] {Operational Mode} } 
					child[concept color=purple!40] { node[concept] {Analysis Mode} }
			} 
			child[concept color=red!70] { node[concept] {Inflow Forecast Model} }
			child[concept color=orange!80] { node[concept] {Data \- Collection} }; 
\end{tikzpicture} 
\end{figure}
\end{document}
